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Altera_Forum
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14 years ago

BSP Content Linking while upgrading Niche UDP Offload Ethernet Example to 10.1

Hi Guys, I'm trying to upgrade the UDP offload example to 10.1 both to give to the community and to use as part of my Uni project (this is a very tiny part). I need to get the UDP offload ex...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hey Tennill,

The payload length is

  • LINE 60: shown on the comments diagram with comment underneath.

  • LINE 293: Taken combinationally from sink data with 8 added. This is to define the UDP header. (shown on LINE 50)

    note: THis is where its only reading 2 bytes in, which would be limiting the size of your packets yeah?

  • LINE 295: Then added with 20 to become the length of of the total IP packet. (shown on LINE 17).

I'm doing testing sending 22 byte packets to avoid this sizing problem in my concept testing. For some reason, its sending garbage packets of total length of 136 before it craps itself.

It should be just packets of 22 + 8 + 20 = 50 bytes, since incorporating the IP and UDP headers.

I've got signal tap going and i can't figure it out.